Objectivec在Google Maps iOS中心固定了标记

Question

我想将标记固定在地图中心，而不管位置坐标如何。如果用户将相机移动到地图上，我希望它一直显示在中心而不会在标记上出现任何闪烁，并且标记上的新位置显示出来，该怎么办？请帮忙。

Answer 1

试试下面的目标C代码

不要忘记设置代表

  mapView.delegate=self;

创建ImageView并将其添加到地图中心

UIImageView *pin =[[UIImageView alloc]init];
pin.frame=CGRectMake(0, 0, 20, 20  );  
pin.center = mapView.center;
pin.image = [UIImage imageNamed:@"location.png"];
[self.view addSubview:pin];
[self.view bringSubviewToFront:pin];

然后使用Google Map的委托方法

//When You Will Scroll Map Then This Method Will Be Called
     - (void)mapView:(GMSMapView *)MapView didChangeCameraPosition:(GMSCameraPosition *)position {

            // Get Latitude And Longitude Of Your Pin(ImageView)
              CLLocationCoordinate2D newCoords = CLLocationCoordinate2DMake( position.target.latitude , position.target.longitude);

              NSLog(@"Latitude-%f\Longitude-%f\n",newCoords.latitude, newCoords.longitude);


     [[GMSGeocoder geocoder] reverseGeocodeCoordinate:CLLocationCoordinate2DMake(newCoords.latitude, newCoords.longitude) completionHandler:^(GMSReverseGeocodeResponse* response, NSError* error) {

             //Get Place Details
             NSLog(@"%@",[[response results]objectAtIndex:0].lines);

    }];           
              return;
     }

Answer 2

尝试下面的代码

GMSCameraPosition *cameraPosition;

- (void)mapView:(GMSMapView *)pMapView didChangeCameraPosition:(GMSCameraPosition *)position {

        /* move draggable pin */
        if (fixedMarker) {

            // stick it on map and start dragging from there..
            if (lastCameraPosition == nil) lastCameraPosition = position;

            // Algebra :) substract coordinates with the difference of camera changes
            double lat = position.target.latitude - lastCameraPosition.target.latitude;
            double lng = position.target.longitude - lastCameraPosition.target.longitude;
            lastCameraPosition = position;
            CLLocationCoordinate2D newCoords = CLLocationCoordinate2DMake(fixedMarker.googleMarker.position.latitude+lat,
                                                                          fixedMarker.googleMarker.position.longitude+lng);
            [fixedMarker.googleMarker setPosition:newCoords];
            return;
        }

    }

    - (void)mapView:(GMSMapView *)mapView idleAtCameraPosition:(GMSCameraPosition *)position {

        cameraPosition = nil; // reset pin moving, no ice skating pins ;)

    }